Add definition for new platform in rbm.conf
In order to be able to integrate Tor Browser for Android into tor-browser-build, we need to add a definition for the new platform into
To do that we need to decide:
which OS we want to use inside the build containers. Probably Debian Stable, unless we have a reason for using something else.
how we want to name this new tor browser platform in
tor-browser-build/rbm.conf. Currently we have: